OFDM Basic Principle

OFDM Basic Principle

• OFDM is a multi-carrier modulation scheme that transmits data over a number

  of orthogonal sub-carriers. Conventional transmission uses only a single carrier.
• OFDM breaks the data to be sent in to multiple data streams. Each data stream

  is passed to a sub-carrier for modulation. The data streams are sent in parallel

  on the orthogonal sub-carriers.
• OFDM Advantages
  

  • NLOS performance while maintaining a high level of spectral efficiency
    and maximizing the available spectrum.
  • Simple equalizer design.
  • Supports operation in multi-path propagation environments.
  • Uses a cyclic prefix to provide multi-path immunity and tolerance for time synchronization errors.
  • Scalable bandwidths provide flexibility and potentially reduces capital expense.